Basis of Presentation	6 Months Ended
Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Note 1. Basis of Presentation AMERISAFE, Inc. (the “Company”) is an insurance holding company incorporated in the state of Texas. The accompanying unaudited condensed consolidated financial statements include the accounts of AMERISAFE and its subsidiaries: American Interstate Insurance Company (“AIIC”) and its insurance subsidiaries, Silver Oak Casualty, Inc. (“SOCI”) and American Interstate Insurance Company of Texas (“AIICTX”), Amerisafe Risk Services, Inc. (“RISK”) and Amerisafe General Agency, Inc. (“AGAI”). AIIC and SOCI are property and casualty insurance companies organized under the laws of the state of Nebraska. AIICTX is a property and casualty insurance company organized under the laws of the state of Texas. RISK, a wholly owned subsidiary of the Company, is a claims and safety service company currently servicing only affiliated insurance companies. AGAI, a wholly owned subsidiary of the Company, is a general agent for the Company. AGAI sells insurance, which is underwritten by AIIC, SOCI and AIICTX, as well as by nonaffiliated insurance carriers. The assets and operations of AGAI are not significant to that of the Company and its consolidated subsidiaries. The terms “AMERISAFE,” the “Company,” “we,” “us” or “our” refer to AMERISAFE, Inc. and its consolidated subsidiaries, as the context requires. The Company provides workers’ compensation insurance for small to mid-sized employers engaged in hazardous industries, principally construction, trucking, logging and lumber, manufacturing, and agriculture. Assets and revenues of AIIC represent at least 95% of comparable consolidated amounts of the Company for each of the six months ended June 30, 2018 and 2017. In the opinion of management of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the financial position, the results of operations and cash flows for the periods presented. The unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934 and therefore do not include all information and footnotes to be in conformity with accounting principles generally accepted in the United States (“GAAP”). The results for the interim periods are not necessarily indicative of the results of operations that may be expected for the year. The unaudited condensed consolidated financial statements contained herein should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Adopted Accounting Guidance In January 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance requires fair value measurement for equity investments (not including those that result in consolidation of the investee or use the equity method of accounting) and the recognition of changes in fair value to be presented as a component of net income. The guidance also revises the disclosure requirements related to fair value changes of liabilities presented in comprehensive income, eliminates disclosure related to the methods and assumptions underlying fair value for financial instruments measured at amortized cost, and simplifies impairment assessments for equity investments without readily determinable fair values. The adoption of this new guidance in the first quarter of 2018 resulted in an immaterial decrease in net income of $390 thousand or a $0.02 decrease in our diluted earnings per common share. In May 2014, the FASB issued ASU 2014-09 (Topic 606): Revenue from Contracts with Customers. The guidance revises the criteria for revenue recognition and requires that the revenue recognized reflect the transfer of promised goods or services to customers in an amount that represents the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard was effective for us in the first quarter of 2018. The adoption of the new guidance had no impact on the Company's reporting and disclosure of net premiums earned, net investment income or net realized gains and losses, as these items are not within the scope of this new guidance. The remaining revenue sources are immaterial and not impacted by the new standard. In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220). This ASU provided new guidance on reclassification from Other Comprehensive Income (“OCI”) of tax effects related to the recently passed tax reform legislation (the “Tax Act”). The guidance gives entities the option to reclassify to retained earnings tax effects related to items in accumulated OCI deemed to be stranded as a result of tax reform. The guidance was effective for us in the first quarter of 2018 and was applied retrospectively. The Company’s policy for releasing income tax effects from accumulated OCI was the individual securities approach for available-for-sale securities. The adoption of this guidance did not have a material impact on our financial condition and results of operations. In December 2017, the SEC issued Staff Accounting Bulletin (SAB) 118 which provided guidance on accounting for tax effects of the Tax Act. Among many changes of the Tax Act which affected Property and Casualty Insurers, the Tax Act required property and casualty taxpayers to discount loss reserves based solely on IRS factors and no longer by reference to historical payment patterns. As the IRS has yet to release the 2018 discount factors, we have used the 2017 IRS discount factors to estimate the impact of the change in loss reserve discounting factors and adjusted our deferred tax balances for the impact of these changes. Once the IRS has released the 2018 loss reserve discount factors, we will complete our analysis and include the effect of the difference in the reserve discount factors in the period the analysis is complete or the impact is reasonably estimable. Prospective Accounting Guidance In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the contract as a capital lease, are met. The new guidance requires a lessee to recognize a lease liability and a right of use asset for all leases extending beyond twelve months. The new guidance is effective for us in the first quarter of 2019. Upon adoption, leases will be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. Adoption of the guidance is not expected to have a material effect on the Company’s consolidated financial statements as the Company does not have any significant leases. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses. The new guidance replaces the methodology of credit loss impairment, which currently, delays the recognition of credit losses until a probable loss has been incurred. The new guidance requires credit losses for securities measured at amortized cost to be determined using current expected credit loss estimates. These estimates are to be derived from historical, current and reasonable supporting forecasts, including prepayments and estimates, and will be recorded through a valuation allowance account that will run through the income statement. The same method will be used for available-for-sale securities, but the valuation allowance will be limited to the amount by which the fair value is below amortized cost. The standard is effective for us in the first quarter of 2020. The Company will continue to monitor and evaluate the impact as the implementation date approaches. All other issued but not yet effective accounting and reporting standards as of June 30, 2018 are either not applicable to the Company or are not expected to have a material impact on the Company.

Note 1. Basis of Presentation

AMERISAFE, Inc. (the “Company”) is an insurance holding company incorporated in the state of Texas. The accompanying unaudited condensed consolidated financial statements include the accounts of AMERISAFE and its subsidiaries: American Interstate Insurance Company (“AIIC”) and its insurance subsidiaries, Silver Oak Casualty, Inc. (“SOCI”) and American Interstate Insurance Company of Texas (“AIICTX”), Amerisafe Risk Services, Inc. (“RISK”) and Amerisafe General Agency, Inc. (“AGAI”). AIIC and SOCI are property and casualty insurance companies organized under the laws of the state of Nebraska. AIICTX is a property and casualty insurance company organized under the laws of the state of Texas. RISK, a wholly owned subsidiary of the Company, is a claims and safety service company currently servicing only affiliated insurance companies. AGAI, a wholly owned subsidiary of the Company, is a general agent for the Company. AGAI sells insurance, which is underwritten by AIIC, SOCI and AIICTX, as well as by nonaffiliated insurance carriers. The assets and operations of AGAI are not significant to that of the Company and its consolidated subsidiaries.

The terms “AMERISAFE,” the “Company,” “we,” “us” or “our” refer to AMERISAFE, Inc. and its consolidated subsidiaries, as the context requires.

The Company provides workers’ compensation insurance for small to mid-sized employers engaged in hazardous industries, principally construction, trucking, logging and lumber, manufacturing, and agriculture. Assets and revenues of AIIC represent at least 95% of comparable consolidated amounts of the Company for each of the six months ended June 30, 2018 and 2017.

In the opinion of management of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the financial position, the results of operations and cash flows for the periods presented. The unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934 and therefore do not include all information and footnotes to be in conformity with accounting principles generally accepted in the United States (“GAAP”). The results for the interim periods are not necessarily indicative of the results of operations that may be expected for the year. The unaudited condensed consolidated financial statements contained herein should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017.

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Adopted Accounting Guidance

In January 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance requires fair value measurement for equity investments (not including those that result in consolidation of the investee or use the equity method of accounting) and the recognition of changes in fair value to be presented as a component of net income. The guidance also revises the disclosure requirements related to fair value changes of liabilities presented in comprehensive income, eliminates disclosure related to the methods and assumptions underlying fair value for financial instruments measured at amortized cost, and simplifies impairment assessments for equity investments without readily determinable fair values. The adoption of this new guidance in the first quarter of 2018 resulted in an immaterial decrease in net income of $390 thousand or a $0.02 decrease in our diluted earnings per common share.

In May 2014, the FASB issued ASU 2014-09 (Topic 606): Revenue from Contracts with Customers. The guidance revises the criteria for revenue recognition and requires that the revenue recognized reflect the transfer of promised goods or services to customers in an amount that represents the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard was effective for us in the first quarter of 2018. The adoption of the new guidance had no impact on the Company's reporting and disclosure of net premiums earned, net investment income or net realized gains and losses, as these items are not within the scope of this new guidance. The remaining revenue sources are immaterial and not impacted by the new standard.

In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220). This ASU provided new guidance on reclassification from Other Comprehensive Income (“OCI”) of tax effects related to the recently passed tax reform legislation (the “Tax Act”). The guidance gives entities the option to reclassify to retained earnings tax effects related to items in accumulated OCI deemed to be stranded as a result of tax reform. The guidance was effective for us in the first quarter of 2018 and was applied retrospectively. The Company’s policy for releasing income tax effects from accumulated OCI was the individual securities approach for available-for-sale securities. The adoption of this guidance did not have a material impact on our financial condition and results of operations.

In December 2017, the SEC issued Staff Accounting Bulletin (SAB) 118 which provided guidance on accounting for tax effects of the Tax Act. Among many changes of the Tax Act which affected Property and Casualty Insurers, the Tax Act required property and casualty taxpayers to discount loss reserves based solely on IRS factors and no longer by reference to historical payment patterns. As the IRS has yet to release the 2018 discount factors, we have used the 2017 IRS discount factors to estimate the impact of the change in loss reserve discounting factors and adjusted our deferred tax balances for the impact of these changes. Once the IRS has released the 2018 loss reserve discount factors, we will complete our analysis and include the effect of the difference in the reserve discount factors in the period the analysis is complete or the impact is reasonably estimable.

Prospective Accounting Guidance

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the contract as a capital lease, are met. The new guidance requires a lessee to recognize a lease liability and a right of use asset for all leases extending beyond twelve months. The new guidance is effective for us in the first quarter of 2019. Upon adoption, leases will be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. Adoption of the guidance is not expected to have a material effect on the Company’s consolidated financial statements as the Company does not have any significant leases.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses. The new guidance replaces the methodology of credit loss impairment, which currently, delays the recognition of credit losses until a probable loss has been incurred. The new guidance requires credit losses for securities measured at amortized cost to be determined using current expected credit loss estimates. These estimates are to be derived from historical, current and reasonable supporting forecasts, including prepayments and estimates, and will be recorded through a valuation allowance account that will run through the income statement. The same method will be used for available-for-sale securities, but the valuation allowance will be limited to the amount by which the fair value is below amortized cost. The standard is effective for us in the first quarter of 2020. The Company will continue to monitor and evaluate the impact as the implementation date approaches.

All other issued but not yet effective accounting and reporting standards as of June 30, 2018 are either not applicable to the Company or are not expected to have a material impact on the Company.